Some Tips  for YouTuber
- don't sub4sub too much. You will not get. enough watch hours from this
- ask for bell notification so that subscribers will know your latest video
- response every comment
- use relevant and accurate keywords
- description shall be meaningful and attractive
- make use the promotional function
-- cards
-- endscreen
- uae5 attractive and standard thumbnails
- Use 3rd party assistance  to get suggestion on keywords
-- Tubebuddy
-- VidIQ

Create one long video (90  minutes)  that will be watched repeatedly to get quick and many views

Yes. I use VidIQ to improve tag or keywords and description. Just use the free one.